Space-charge-dominated beam dynamics simulations using the massively parallel processors (MPPs) of the Cray T3D

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Computer simulations using the multi-particle code PARMELA with a three-dimensional point-by-point space charge algorithm have turned out to be very helpful in supporting injector commissioning and operations at Thomas Jefferson National Accelerator Facility (Jefferson Lab, formerly called CEBAF). However, this algorithm, which defines a typical N{sup 2} problem in CPU time scaling, is very time-consuming when N, the number of macro-particles, is large. Therefore, it is attractive to use massively parallel processors (MPPs) to speed up the simulations. Motivated by this, the authors modified the space charge subroutine for using the MPPs of the Cray T3D. The techniques used to ... continued below

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298 KILOBYTES pages

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Liu, H. October 1996.

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Description

Computer simulations using the multi-particle code PARMELA with a three-dimensional point-by-point space charge algorithm have turned out to be very helpful in supporting injector commissioning and operations at Thomas Jefferson National Accelerator Facility (Jefferson Lab, formerly called CEBAF). However, this algorithm, which defines a typical N{sup 2} problem in CPU time scaling, is very time-consuming when N, the number of macro-particles, is large. Therefore, it is attractive to use massively parallel processors (MPPs) to speed up the simulations. Motivated by this, the authors modified the space charge subroutine for using the MPPs of the Cray T3D. The techniques used to parallelize and optimize the code on the T3D are discussed in this paper. The performance of the code on the T3D is examined in comparison with a Parallel Vector Processing supercomputer of the Cray C90 and an HP 735/15 high-end workstation.

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298 KILOBYTES pages

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INIS; OSTI as DE96015335

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  • Other Information: Supercedes report DE96015335; PBD: 1 Oct 1996

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  • Other: DE96015335
  • Report No.: DOE/ER/40150--380
  • Report No.: JLAB-ACC--96-03
  • Report No.: ON:DE96015335
  • Grant Number: AC05-84ER40150
  • DOI: 10.2172/378908 | External Link
  • Office of Scientific & Technical Information Report Number: 378908
  • Archival Resource Key: ark:/67531/metadc689091

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  • October 1996

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  • July 25, 2015, 2:20 a.m.

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  • Feb. 17, 2017, 6:30 p.m.

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Liu, H. Space-charge-dominated beam dynamics simulations using the massively parallel processors (MPPs) of the Cray T3D, report, October 1996; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc689091/: accessed October 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.